Today`s wide-spread Internet technology allowed consumers to access much Word-of-Mouth information through an online board. As communication and exchanging information between travelers becomes easier and faster, e-WOM (Electronic Word-of-Mouth) is recognized as one of the most influencing communication methods in today`s society. This new trend implies a significant impact to travel industry. This study focuses on interaction between Credibility on e-WOM, brand attitude, WOM acceptance, WOM activity and purchasing intention of travel product. The result of this study suggests: (1) Credibility in e-WOM provides positive effect in brand attitude, (2) Brand Attitude gives positive effect on WOM acceptance, WOM activity and purchasing intention of travel product, (3) WOM acceptance gives positive effect on WOM activity, but it is not effective on purchasing intention of travel product. Regarding e-WOM management of travel agencies through its website or online community, authors would like to argue that travel agencies need to build positive brand attitude based on Credibility in brand, which would lead consumers to positively acknowledge its brand and spread words out to other consumers.